<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="../js/jquery-3.5.1.min.js"></script>
		<script>
			function funA(){
				$(":empty").html("aaa");
			}
			function funB(){
				$("div:contains('b')").css("color","red");
			}
		</script>
	</head>
	<body>
		<button onclick="funA()">funA</button>
		<button onclick="funB()">funB</button>
		<div>aa</div>
		<div></div>
		<div>bb</div>
		<div>cc</div>
		<div>bc</div>
	</body>
</html>
